Research on high precision detection of seawater absorbance
-
摘要: 采用紫外-可见分光法测量不同浓度的海水相对于纯水的吸光度，为达到高精度检测海水吸光度的要求，在检测海水吸光度时将仪器本身固有的背景信号及样品容器之间的差异所产生的误差纳入研究范畴，对实验方法展开进一步的优化，利用差减的方法滤除背景信号的干扰，同时验证了比色皿空杯相对于空气吸光度的重复性及比色皿之间相对于空气吸光度的差异性，再利用差减的方法滤除比色皿之间的差异所带来的误差，并且选取一定的特征波长观察其相对于纯水的吸光度数据，验证了运用优化后的实验检测方法最终达到高精度测量海水吸光度的目的（<0.000 5 AU），对于精确检测高透明度水域中的各种物质具有重要意义。Abstract: UV-Vis (Ultraviolet and visible) spectrometry was used to measure the absorbance of seawater with different concentrations relative to pure water. In order to meet the requirements for high-precision detection of seawater absorbance, the inherent background signal of the instrument and the difference between the sample containers were used to detect the absorbance of seawater where the error was included in the research category, and the experimental method was further optimized. The subtraction method was used to filter out the interference of the background signal. At the same time, the repeatability of the cuvette empty cup with respect to air and the cuvette with respect to air were verified. The difference in absorbance, and the error caused by the difference between cuvettes was filtered by the method of subtraction, and a certain characteristic wavelength was selected to observe its absorbance data relative to pure water, which verified the use of optimized experimental detection. The method finally achieves the purpose of measuring the absorbance of seawater with high accuracy (<0.000 5 AU). It was of considerable importance for detection of various substances in highly transparent water.
-
Key words:
- UV-Vis spectroscopy /
- high precision /
- absorbance of seawater
-
[1] Wang Lili. Research on seawater quality monitoring technology based on UV-visible spectra[D]. Tianjin:Tianjin University, 2014. (in Chinese) [2] Hu Jingshan. Analysis of the application of ultraviolet spectrophotometry in environmental monitoring[J]. Journal of Science & Technology and Economy, 2017(21):123. (in Chinese) [3] Tang Bin. Research on the key technology of multi-parameter measurement system for water quality detection in ultraviolet-visible spectrum[D]. Chongqing:Chongqing University, 2014. (in Chinese) [4] Liu Baobao. Research progress of water quality monitoring technology based on UV-Vis analysis[J]. Sichuan Building Materials, 2016, 42(1):297-298, 300. (in Chinese) [5] Lian Yun, Zhang Tao, Hong Xuehua. Failure maintenance of AGILENT spectrophotometer chemStation[J]. Environmental Science and Technology, 2011, 34(S2):223-224, 227. (in Chinese) [6] Liu Guoxiao. Research progress and application of UV-visible full spectrum analyzer in the field of water Quality Monitoring[J]. Value Engineering, 2019, 38(31):166-167. (in Chinese) [7] Tang Ge. Research on data processing method technology of water quality monitoring system based on distributed UV-visible spectroscopy[D]. Chongqing:Chongqing University, 2016. (in Chinese) [8] Zeng Tianling, Wen Zhiyu, Wen Zhongquan, et al. Research progress of water quality monitoring technology based on ultraviolet spectrum analysis[J]. Spectroscopy and Spectral Analysis, 2013, 33(4):1098-1103. (in Chinese) [9] Yang Yanhua, Li Huijing, Wang Haihai. Intensity and abnormal absorption of infrared absorption peaks[J]. Spectroscopy and Spectral Analysis, 2011, 31(8):2086-2089. (in Chinese) [10] Hu Yanqin, Chen Yujing, Li Huihua, et al. Abnormal absorption and high quality far infrared spectroscopy[J]. Spectroscopy and Spectral Analysis, 2012, 32(2):339-342. (in Chinese) [11] Xu Yangbiao, Wang Haihai. The absorption intensity and abnormal absorption of infrared spectra of reference samples[J]. Spectroscopy and Spectral Analysis, 2018, 38(S1):105-106. (in Chinese) [12] Marta Ramírez-Pérez, Rüdiger Rüttgers, Elena Torrecilla, et al. Cost-effective hyperspectral transmissometers for oceanographic applications:performance analysis[J]. Sensors, 2015, 15:20967-20989. -
点击查看大图
计量
- 文章访问数: 803
- HTML全文浏览量: 154
- PDF下载量: 50
- 被引次数: 0
下载:
